According to surveys by the National Institute on Drug : GMAT Sentence Correction (SC)
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# According to surveys by the National Institute on Drug

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According to surveys by the National Institute on Drug [#permalink]

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02 Jul 2007, 17:14
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51. According to surveys by the National Institute on Drug Abuse, about 20 percent of young adults used cocaine in 1979, doubling those reported in the 1977 survey.
(A) doubling those reported in the 1977 survey
(B) to double the number the 1977 survey reported
(C) twice those the 1977 survey reported
(D) twice as much as those reported in the 1977 survey
(E) twice the number reported in the 1977 survey

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CEO
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06 Aug 2007, 13:03
A is wrong. doubling is wrong tense.

B is wrong. cannot tack on an infinitive to connect a clause to an independent clause

C is wrong because those refers back to 20 percent (of young adults), which is singular.

D. same as C.

E. least of 5 evils. percentages is considered a number...?
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06 Aug 2007, 13:15
(C) twice those the 1977 survey reported

I guess those correctly refers to plural (20%) because 20 percent inherits the plurality from Adults (plural)...

My answer os of course E
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06 Aug 2007, 13:33
Will pick E. Concise and idiomatic.

Double is used as verb. What is OA pls..
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06 Aug 2007, 22:23
C is wrong as it changes the meaning

D is incorrect for usage of as much as

E it is
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06 Aug 2007, 23:05
bmwhype2 wrote:
A is wrong. doubling is wrong tense.

B is wrong. cannot tack on an infinitive to connect a clause to an independent clause

C is wrong because those refers back to 20 percent (of young adults), which is singular.

D. same as C.

E. least of 5 evils. percentages is considered a number...?

Percentage is a fraction of a number and is a number... right?
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03 Sep 2007, 02:30
ioiio wrote:
bmwhype2 wrote:
A is wrong. doubling is wrong tense.

B is wrong. cannot tack on an infinitive to connect a clause to an independent clause

C is wrong because those refers back to 20 percent (of young adults), which is singular.

D. same as C.

E. least of 5 evils. percentages is considered a number...?

Percentage is a fraction of a number and is a number... right?

The number of children is greater than 10.
More than 10 children play in the sandbox.
The number of children has grown by greater than ten percent in the past year.
The number of children has grown by more than ten percent in the past year.
03 Sep 2007, 02:30
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